The correct answer is B. non-repudiation.
Non-repudiation is a security service that ensures that the sender of a message cannot deny having sent the message, and that the recipient cannot deny having received the message. This is achieved by using digital signatures or message authentication codes.
Accounting is the process of tracking and recording the use of resources. This is done to ensure that resources are used in a responsible and efficient manner.
Sniffing is the process of eavesdropping on network traffic. This can be done to steal data or to gain unauthorized access to a system.
Authorization is the process of granting users access to resources. This is done to ensure that only authorized users can access sensitive data or systems.
Here is a table that summarizes the key differences between the four options:
| Option | Description |
|—|—|
| Non-repudiation | A security service that ensures that the sender of a message cannot deny having sent the message, and that the recipient cannot deny having received the message. |
| Accounting | The process of tracking and recording the use of resources. |
| Sniffing | The process of eavesdropping on network traffic. |
| Authorization | The process of granting users access to resources. |